Refactor AcceleratedStaticBitmapImage

third_party/WebKit/Source/platform/graphics/MailboxTextureHolder.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MailboxTextureHolder_h
+#define MailboxTextureHolder_h
+
+#include "platform/PlatformExport.h"
+#include "platform/graphics/TextureHolder.h"
+#include "third_party/khronos/GLES2/gl2.h"
+
+namespace gpu {
+namespace gles2 {
+class GLES2Interface;
+}
+}
+
+namespace blink {
+
+class SkiaTextureHolder;
+
+class PLATFORM_EXPORT MailboxTextureHolder final : public TextureHolder {
+ public:
+  ~MailboxTextureHolder() override;
+
+  bool isSkiaTextureHolder() final { return false; }
+  unsigned sharedContextId() final;
+  gpu::Mailbox getMailbox() final { return m_mailbox; }
+  gpu::SyncToken getSyncToken() final { return m_syncToken; }
+  IntSize getMailboxSize() final { return m_size; }
+  void releaseImageThreadSafe() final {}
+  sk_sp<SkImage> getSkImage() final { return nullptr; }
+  WebThread* getImageThread() final;
+  IntSize size() const final { return m_size; }
+  void setSharedContextId(unsigned contextId) final {}
+  void setImageThread(WebThread* thread) final {}
+  void updateSyncToken(gpu::SyncToken syncToken) final {
+    m_syncToken = syncToken;
+  }
+
+  // In WebGL's commit or transferToImageBitmap calls, it will call the
+  // DrawingBuffer::transferToStaticBitmapImage function, which produces the
+  // input parameters for this method.
+  MailboxTextureHolder(const gpu::Mailbox&,
+                       const gpu::SyncToken&,
+                       unsigned textureId,
+                       gpu::gles2::GLES2Interface*,
+                       IntSize mailboxSize);
+  // This function turns a texture-backed SkImage into a mailbox and a
+  // syncToken.
+  MailboxTextureHolder(sk_sp<SkImage>);
+
+ private:
+  gpu::Mailbox m_mailbox;
+  gpu::SyncToken m_syncToken;
+  unsigned m_textureId;
+  gpu::gles2::GLES2Interface* m_gl;
+  IntSize m_size;
+};
+
+}  // namespace blink
+
+#endif  // MailboxTextureHolder_h